①3.02×(2.52÷1.2)
②0.625÷1.25×8
③(1.7×0.8-0.1)÷0.3
④16.8×101–16.8
①28.4×99+28.4
②3.6×201
③4×0.8×12.5×2.5
④17.5×0.27+1.75×1.3
①3.86+6.4+2.14+7.6
②5.2÷0.32﹣0.12
③()×15
④
⑤
⑥